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Closed 10 years ago.
let f x y = sqrt x+y
in let g = f 4
in g 1 + g 2
Is sqrt(4 + 1) + sqrt(4 + 2) or (sqrt(4) + 1) + (sqrt(4) + 2))
?
This appears in http://www.csse.monash.edu.au/~lloyd/tildeFP/1989SPE/
It may well be none at all, as the syntax has been fairly established since at least the 1960s as functional pseudocode/lingua franca.
The date (revised in 1989) would suggest Miranda or SASL, but they both lean rather heavily toward where clauses rather than let. (I'm not even sure if they have let.)
So what it most likely is, if it's any specific language at all, is Lazy ML, which was developed at Chalmers in the early 1980s.
Related
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Closed 9 years ago.
How do we find the solution of x
say in
2*x=6
using R?
It must be very trivial but I cant find out the appropriate answer.
You can use the solve() function, which can actually handle multiple equations:
solve(2, 6)
The first argument is the left side of the equation, the second is the right side.
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Closed 10 years ago.
In many programming problems (e.g. some Project Euler problems) we are asked to report the answer as the remainder left after dividing the answer by 1,000,000,007.
Why not any other number?
Edit:
2 years later, here's what I know: the number is a big prime, and any answer to such a question is so large that it makes sense to report a remainder instead (as the number may be too large for a native datatype to handle).
Let me play a telepathist. 1000...7 are prime numbers and 1000000007 is the biggest one that fits in 32-bit integer. Since prime numbers are used to calculate hash (by finding the remainder of the division by prime), 1000000007 is good for calculating 32-bit hash.
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Closed 10 years ago.
I am using a data set called Forbes2000 which is provided by the package HSAUR. I am able to plot the data but not able to abbreviate each point with the corresponding country name. Here is the code I have tried:
Forbes2000top50ccompanies <- head(Forbes2000[order(Forbes2000$profits, decreasing= T),], n = 50)
plot(sales ~ assets,data=Forbes2000top50ccompanies)
This will give you labels that are the first 4 letters of the country names and make them smaller than would be the default:
with(Forbes2000top50ccompanies,
text(x=assets, y=sales,
labels=substr(Forbes2000top50ccompanies$country, 1, 4), cex=0.6) )
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Closed 11 years ago.
How to calculate standard deviation of a single decimal value, in C#
I do it in SAS code as the following:
std(x y m ) = xSTD YSTD mSDT;
It is simply 0 see the wiki article.
Let X be the number
Calculate EV of [x] which is x
Subtract EV from each element in set which is [0]
Take the average of [0] which is 0
Take the square root of 0 which is 0
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Closed 11 years ago.
A == B if C == D
C == D if A == B
Does A == B?
There is not enough information to provide a solution.
If the first statement is true, than the second is true. If the second statement is true, than the first is true.
It is just making a loop around and not proving anything.
Only if C==D.
Not much use, I know, but I think it's all we can say with the information given.